An 18th-century picture scroll featuring a procession of Japanese demons and monsters is for sale on eBay. This 11.25 meter (37 ft) long work depicts the Hyakki Yakō (lit. "Night Parade of One Hundred Demons") -- a deadly parade of demons and yōkai (traditional monsters) that, according to Japanese folklore, would often take place on summer nights. The Hyakki Yakō was a popular theme in Japanese visual art during the Edo period, and portrayals of these processions, while frightening, often incorporated a sense of humor. Here are a few images of the scroll, which is currently priced at $15,000.